﻿public class code023{
	public static void main(String[] args){
		int score = 70;
		if (score>=90){
		System.out.println("优秀");
	}else if (score>=80){
	System.out.println("良好");
	}else if (score>=60){
	System.out.println("中等");
	}else if (score<60){
	System.out.println("差");
	
}
	}
}
	